My first thought was, if you double click the note row you get all the valid inputs, like c, b, ~~ (and PC and PCs which i don't know what does) and so on. I want to use ctrl + q to make it available for ^^
1. To use all the valid inputs like ^^, ~~ and PC and PCs which i don't know what does by using transpose +1 from example c5. And when you've reached the last valid input, you start at the bottom again. No note, c0 and so on.
2. This feature over the entire pattern. Like instrument 1 and with transpose + 1 you get intstrument 2, effect b to c.
Edit: Most people use ctrl + q/a for tranposing +-1
Edit: Moved to the issue tracker:
http://bugs.openmpt.org/view.php?id=34